<?php
/**
 * IG_Observer
 *
 * @author maomao.thx@gmail.com
 * @copyright Copyright (c) 2009 Green Shore (http://www.iwgame.com)
 * @version $Id: Observer.php 524 2011-05-24 01:44:20Z mmxie $
 */
abstract class IG_Observer
{
    public abstract function update($sender, $args);
}